Home / Standards / GB/T 47400-2026 GB/T 47400-2026 Upcoming X-ray digital imaging method for detection of petrochemical polyethylene pipe welded joints 石油化工用聚乙烯管道焊接接头X射线数字成像检测方法 Standard Type GBT ICS 71.120 CCS G 94 Status 即将实施 Issue Date 2026-03-31 Implementation 2026-10-01 Responsible Dept 中国石油和化学工业联合会 Drafting Unit N/A